The teacher is greatly successful ________ his students ________ convincing them study hard．
The teacher is greatly successful ________ his students ________ convincing them study hard．
A.with;at
B.in;with
C.with;in
D.in;in
答案及解析： C
解析：
be successful with sb．in sth．“在某方面对某人取得成功”。